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#1 (**permalink**) 01-05-2008, 10:26 AM

Hi

I have a strange problem with cron in a Aix 5.3..0.4 box. I have a lot
of cron jobs (250) running in a aix 5.1 box and there is no problem
but when I put the same crontab on a AIX 5.3 box, system send to some
jobs a SIGKILL signal. I look cron.log and no limit is reached ans this
ocurr with differend kind of jobs , shell scripts, cobol binaries ...
I just diag system for possibly memory bugs (all ok) and there is no
environment difference betwen systems.

Any idea?

#2 (**permalink**) 01-05-2008, 10:26 AM

kraniak <carlesguri@gmail.com> wrote:
> I have a strange problem with cron in a Aix 5.3..0.4 box. I have a lot
> of cron jobs (250) running in a aix 5.1 box and there is no problem
> but when I put the same crontab on a AIX 5.3 box, system send to some
> jobs a SIGKILL signal. I look cron.log and no limit is reached ans this
> ocurr with differend kind of jobs , shell scripts, cobol binaries ...
> I just diag system for possibly memory bugs (all ok) and there is no
> environment difference betwen systems.

How can you tell that the processes received SIGKILL?
Do you have any evidence?

Anything in errpt?

Yours,
Laurenz Albe

#3 (**permalink**) 01-05-2008, 10:26 AM

There are nothing in errpt. I look for this signal in execution log of
cobol binaries, diferent progs show a message with a code error
referencing to a sigkill.In case of scripts ( recursive ls for testing
) output list is broken.
I remember that in cpu overload system begin to send kills to different
processes ; this behaviour is similar, but cpu load is normal.

thanks

Laurenz Albe wrote:
> kraniak <carlesguri@gmail.com> wrote:
> > I have a strange problem with cron in a Aix 5.3..0.4 box. I have a lot
> > of cron jobs (250) running in a aix 5.1 box and there is no problem
> > but when I put the same crontab on a AIX 5.3 box, system send to some
> > jobs a SIGKILL signal. I look cron.log and no limit is reached ans this
> > ocurr with differend kind of jobs , shell scripts, cobol binaries ...
> > I just diag system for possibly memory bugs (all ok) and there is no
> > environment difference betwen systems.
>
> How can you tell that the processes received SIGKILL?
> Do you have any evidence?
>
> Anything in errpt?
>
> Yours,
> Laurenz Albe

#4 (**permalink**) 01-05-2008, 10:26 AM

kraniak wrote:
> Hi
>
> I have a strange problem with cron in a Aix 5.3..0.4 box. I have a lot
> of cron jobs (250) running in a aix 5.1 box and there is no problem
> but when I put the same crontab on a AIX 5.3 box, system send to some
> jobs a SIGKILL signal. I look cron.log and no limit is reached ans this
> ocurr with differend kind of jobs , shell scripts, cobol binaries ...
> I just diag system for possibly memory bugs (all ok) and there is no
> environment difference betwen systems.
>
> Any idea?

are more jobs running at the same time now than before? the default
maximum cron jobs to run at any one time is 100. see
/var/adm/cron/queuedefs

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